The 4x100 adaptors would allow the fitting of Golf steels which can be found for a reasonable sum and would look quite 'Dunlop' like if sprayed satin silver and fitted with dummy spinners.
http://www.ebay.co.uk/itm/Triumph-Sp...item35b20650b1
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http://www.ebay.co.uk/itm/Genuine-VW...item27c4fc5b4e
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https://www.europaspares.com/product...____cpds_.html
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http://www.realmengineering.com/dunl...%20wheels.html
Of course, if your vehicle inspection prohibits widening the track you're stuck with standard steels or MGF alloys.